【简答题】Exercise 2 You will hear 10 pairs of things. If the two things you hear are of the same kind, write “S” in the brackets. If different, write “D”. Example: You hear: bananas and tomatoes You write: (D)...
【单选题】The more exercise you do, the _______ you will be.
【简答题】Use the words you wrote in exercise 2 to complete the sentences .You will not need all of them.
【简答题】计算下列曲线积分: (1)∫ C (x+y)ds,其中C是以a为半径、圆心在原点的右半圆周; (2) ,其中C为圆周x 2 +y 2 =ax
【简答题】2018高考 读零件图,回答下列问题 (1)表达该零件时,主视图采用了全剖视图,左视图采用了 视图,B为 视图,A—A为 视图。 (2)该零件采用的绘图比例是1:2,零件的总高为 。 (3)该零件宽度方向的尺寸基准是 线。 (4)尺寸“Φ60H7”表示该孔的基本尺寸是 ,基本偏差代号为 ,公差等级为 级,最小极限偏差为 。 (5)该零件共有 种不同的表面结构(表面粗糙度)要求,零件底面表面结构(表...
【简答题】Exercise 2 Directions: You will hear eight short conversations. After each conversation a question will be asked. Answer the question. Both the conversation and question will be read only once.
【简答题】求证下列不等式: (1) 为连结点一i到i的直线段. (2)|∫eeizdz|<π,其中C为圆周|z|=R的上半圆周从R到一R.